Tap the screen to release the balls, you need to do that in a perfect timing so balls fall into trucks.
Each ball you get into the truck rewards you with a different amount of points, depending on the truck score multiplier.
If the ball misses the truck, it disappears.
When you lose all 100 of your balls, the game is over.
The game is endless and your only goal is to reach as many score points as you can.